<!DOCTYPE HTML>
<html>

<head>
    <title>popup</title>
    <meta name="viewport" id="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <meta charset="utf-8">
    <style type="text/css">
        html, body {
            background-color: #fff;
            margin: 0px;
            padding: 0px;
            width:100%;
            height:100%;
        }
        .container{
            width:100%;
            height:100%;
            background: #ff0000;
            border-radius: 50%;
        }
    </style>
</head>

<body>
    <div class="container"></div>
    <script>  
    </script>
</body>
</html>